Includes bibliographical references (leaves 102-114) The highly successful biological control of the citrophilous mealybug Pseudococcus calceolarie (Maskell) (CM) by the parasitic wasp Coccophagus gurneyi Compere in several countries led to the release of this parasitoid in the Riverland of South Australia as part of an integrated pest management program. However CM has not been successfully controlled in this region. The results of this study may help to explain the lack of effective biological control of CM in Riverland citrus.

"August 2003." / Includes bibliographical references (leaves 294-333) / 2 v. (xxxi, 333 leaves) ; ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Agriculture and Wine, Discipline of Plant and Pest Science, 2005

Includes bibliographical references (leaves 168-198) The horehound plume moth (Wheeleria spilodactylus Curits), an agent introduced to control the invasive weed horehound (Murrubium vulgare L.), was used as a model system to investigate factors believed to influence the successful establishment of an introduced natural enemy. Retrospectively tests the use of generic population viability analysis and decision making tools for determining optimal release strategies for the horehound plume moth in South Australia and to compare outcomes with the emprical data collected during the course of this project

The objective of this Ph.D. research was to identify new and novel mechanisms of wild radish (Raphanus raphanistrum L.) resistance to photosystem II (PSII) inhibitors, auxinics, and acetohydroxyacid synthase (AHAS) inhibitors. PSIIinhibitor resistance was demonstrated to be target-site based, and conferred by a Ser264 to Gly substitution of the D1 protein. Auxinic resistance was associated with reduced herbicide translocation to the meristematic regions of resistant wild radish plants. Two new resistance mutations of wild radish AHAS were discovered, including one encoding the globally rare Asp376 to Glu substitution, and another encoding an Ala122 to Tyr substitution, which has never been identified or assessed for resistance in plants previously. Characterization of the frequency and distribution of AHAS resistance mutations in wild radish from the WA wheatbelt revealed that Glu376 was widespread, and that some mutations of AHAS are more common than others. Computer simulation was used to examine the molecular basis of resistance-endowing AHAS target-site mutations. Furthermore, through the computer-aided analysis, residues were identified with the potential to confer resistance upon substitution, but which have not previously been assessed for this possibility. Results from this Ph.D. research demonstrate that diverse, unrelated mechanisms of resistance to PSII inhibitors, auxinics, and AHAS inhibitors have evolved in wild radish of the WA wheatbelt, and that these mechanisms have accumulated in some populations.

Includes bibliographical references (leaves 168-198) / xiv, 204 leaves ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The horehound plume moth (Wheeleria spilodactylus Curits), an agent introduced to control the invasive weed horehound (Murrubium vulgare L.), was used as a model system to investigate factors believed to influence the successful establishment of an introduced natural enemy. Retrospectively tests the use of generic population viability analysis and decision making tools for determining optimal release strategies for the horehound plume moth in South Australia and to compare outcomes with the emprical data collected during the course of this project / Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2002

Copies of author's previously published articles inserted. / Bibliography : leaves 201-217. / ix, 216 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Concentrates on the settlement and nursery stages of the life history of Panaeus latisulcatus over a seven year history. Key nursery areas within the Gulf of St. Vincent were monitored between October 1989 and June 1996. It was determined that the best sampling technique was the use of a fully enclosed jet net. A mean index of abundance calculated from these trawls was used to estimate the relative abundance in the area sampled. No particular trend in post larval settlement patterns and juvenile abundance was obvious. A longer time frame may be required to observe significant changes in this species. / Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 1999

Bibliography: leaves 214-235 / iv, 235 leaves : ill ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Zoology, 1987

Copies of author's previously published articles inserted. / Bibliography : leaves 201-217. / ix, 216 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Concentrates on the settlement and nursery stages of the life history of Panaeus latisulcatus over a seven year history. Key nursery areas within the Gulf of St. Vincent were monitored between October 1989 and June 1996. It was determined that the best sampling technique was the use of a fully enclosed jet net. A mean index of abundance calculated from these trawls was used to estimate the relative abundance in the area sampled. No particular trend in post larval settlement patterns and juvenile abundance was obvious. A longer time frame may be required to observe significant changes in this species. / Thesis (Ph.D.)--University of Adelaide, Dept. of Environmental Biology, 1999

Bibliography: leaves [175-181]

Bibliography: leaves 119-218. / xiv, 218 leaves : ill. (some col.), maps (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Salt Manager represents the software system developed by this thesis to implement an interactive land classification methodology. An Expert System (ES), a Geographic Information System (GIS), remotely sensed information and a relational database management system (RDBMS) have been utilised to construct the methodology. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geography, 1995